Question # 1

Two charged spheres are separated by 2 mm Which of the following would produce the greatest attractive force.

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+1 q and + 4 q

-1 q and -4 q

+2 q and +2 q

+2 q and -2q

The mass of an alpha particle is.

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2 u

4 u

6 u

8 u

The product of mass and specific heat of a substance is called.

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Latent heat

Water equivalent

Atomic heat

Heat capacity

Rainbows and mirage are formed by

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Reflection only

Refraction only

dispersion only

A combination of refraction, total internal refraction and dispersion

if temperature eon Celsius scale is 50 oC the temperature on Fahrenheit scale will be.

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102 ^oF

108 ^oF

112 ^oF

122 ^oF

In which device is a permanent magnet used

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An electric bell

An electromagnet

A plotting compass

A relay

A tank 3 m long 1 m wide and 0.5 m deep is filled with oil which weight 12,000 N . The pressure on the base of the tank due to oil is.

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1,000 Pa

4,000 Pa

3,000 Pa

6,000 Pa

Which of the following electron wavelength is used in electron microscope.

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Short

Extremely short

Large

Moderate

An ideal voltage source has zero.

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Current

Electromotive force

Voltage

Internal resistance

In de Brogile model electron orbit must form

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Spectrum

Wave packets

Franhoffer lines

Clouds

MT-2 is the dimensionless formula of.

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Moment of iniertia

Viscosity

surface tension

Angular acceleration

If a body is moving with constant velocity then

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Its acceleration is zero

Its direction may be changing

Its speed may be changing

Its acceleration is constant

Out of the following pairs, which one does not have te same dimensions.

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Force and weight

Pressure and stress

Energy and work

Momentum and torque

A heat sensitive resistor is called.

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Thermistor

Varibale resistor

Fixed resistor

Zero resistor

Marie Curie and Pierre Curie discovered two new radioactive elements which are.

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Uranium and radkum

Platinum and radium

Polonium and radium

Crypton and radon

In scientific notation 0.0003 can be written as.

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3 x 10⁴

3 x 10^-4

3.0 x 10³

3.0 x 10^-3

The electric supply line in houses works at 220 V what will be the amplitude of emf.

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120 V

331 V

220 V

440 V

Any alternations product in shape length of volume where a body is subjected to some external force is called

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Deformation

Polymerization

Crystallization

Elasticity

The specific heat capacity of the body depends upon.

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the heat given to it

Mass of the body

Temperature raised

Material of the body

The basic circuit element is a D.C. circuit is

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An inductor

A resistor

A capacitor

A battery

The permeability of air is

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0.5

zero

infinity

Unity

The value of magnetic field strength for parament magnets is.

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Unity

Infinity

Zero

Two

Which of the following is non renewable source of energy.

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Wind

Coal

Hydroelectric

Biomass

Which temperature is required for the fusion of two nuclides.

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10⁶ K

10⁷K

10⁸K

10 ⁹ K

The energy in electron volts necessary to remove the most loosely bound electron from the neutral atom is known as.

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Faraday energy

Wave number

Ionization Potential

Excitation potential

Original source of biomass is.

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Stars

Moon

earth

Sun

Difference in the density of two medium when waves are passing from one into another medium always results in the change in.

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Wave speed

Wave direction

Both speed and direction

Wave frquency

With the increase of temperature, teh pitch of an organ pipe

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Increase

Descrease

Remain the same

May increase or decrease

Bracket and plunk series of spectral lines lye in the

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Visible region

Ultraviolet region

Far infrared region

Infrared region

Larger the diameter of the objective of a telescope.

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Greater is its resolving power

Lesser is its resolving power

Lesser is its magnifying power

greater is its magnifying power

A convex lens of focal length 6 cm to be used to from a virtual image three times the size of the object Where must the lens be placed.

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1 cm

2 cm

3 cm

4 cm

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